/* ============================================================
   STUDY HUB — MOCK TEST SYSTEM — PREMIUM CSS v2
   Fixed: blank spaces, fonts matched to main site, all overlaps
   ============================================================ */

/* Font matching study-hub-kappa.vercel.app */
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700;800&family=Inter:wght@300;400;500;600;700&display=swap');

/* ── Variables ──────────────────────────────────────────── */
:root {
  --bg: #0a0a12;
  --bg2: #0d0d18;
  --bg3: #11111c;
  --surface: #161625;
  --surface2: #1c1c2e;
  --border: rgba(139,92,246,0.18);
  --border2: rgba(255,255,255,0.07);

  --purple: #8b5cf6;
  --purple-dark: #6d28d9;
  --purple-light: #a78bfa;
  --indigo: #6366f1;
  --amber: #f59e0b;
  --emerald: #10b981;
  --red: #ef4444;
  --sky: #0ea5e9;

  --text: #f0eeff;
  --text2: #9896b8;
  --text3: #5e5d7a;

  --glow-purple: 0 0 40px rgba(139,92,246,0.25);
  --glow-amber:  0 0 40px rgba(245,158,11,0.25);
  --glow-emerald:0 0 30px rgba(16,185,129,0.20);

  --radius:    14px;
  --radius-sm:  9px;
  --radius-xl: 22px;

  --font-display: 'Space Grotesk', sans-serif;
  --font-body:    'Inter', sans-serif;

  --transition:      0.28s cubic-bezier(0.4,0,0.2,1);
  --transition-slow: 0.55s cubic-bezier(0.4,0,0.2,1);
}

/* ── Reset ──────────────────────────────────────────────── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.65;
  min-height:100vh;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{cursor:pointer;border:none;background:none;font-family:inherit}

/* ── Scrollbar ──────────────────────────────────────────── */
::-webkit-scrollbar{width:5px}
::-webkit-scrollbar-track{background:var(--bg)}
::-webkit-scrollbar-thumb{background:rgba(109,40,217,.6);border-radius:100px}

/* ── Typography ─────────────────────────────────────────── */
h1,h2,h3,h4,h5{
  font-family:var(--font-display);
  font-weight:700;
  line-height:1.2;
  letter-spacing:-0.01em;
}

.gradient-text{
  background:linear-gradient(135deg,#c084fc,#818cf8,#a78bfa);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}
.gradient-text-amber{
  background:linear-gradient(135deg,#fcd34d,#f59e0b,#d97706);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}

/* ── Buttons ────────────────────────────────────────────── */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 26px;
  border-radius:11px;
  font-family:var(--font-display);
  font-weight:600;
  font-size:14px;
  transition:var(--transition);
  position:relative;
  overflow:hidden;
  white-space:nowrap;
  cursor:pointer;
  text-decoration:none;
  border:none;
}
.btn::after{content:'';position:absolute;inset:0;background:#fff;opacity:0;transition:opacity .18s}
.btn:hover::after{opacity:.06}
.btn:active{transform:scale(.97)}

.btn-primary{
  background:linear-gradient(135deg,#8b5cf6,#6366f1);
  color:#fff;
  box-shadow:0 4px 18px rgba(99,102,241,.38);
}
.btn-primary:hover{box-shadow:0 8px 28px rgba(99,102,241,.55);transform:translateY(-2px)}

.btn-secondary{
  background:rgba(139,92,246,.1);
  color:var(--purple-light);
  border:1px solid rgba(139,92,246,.28);
}
.btn-secondary:hover{background:rgba(139,92,246,.18);border-color:rgba(139,92,246,.55);transform:translateY(-2px)}

.btn-amber{
  background:linear-gradient(135deg,#f59e0b,#d97706);
  color:#0a0a12;
  font-weight:700;
  box-shadow:0 4px 18px rgba(245,158,11,.35);
}
.btn-amber:hover{box-shadow:0 8px 28px rgba(245,158,11,.55);transform:translateY(-2px)}

.btn-large{padding:16px 36px;font-size:16px;border-radius:13px}
.btn-sm{padding:9px 18px;font-size:13px;border-radius:9px}
.btn-full{width:100%;justify-content:center}

/* ── Section Headers ────────────────────────────────────── */
.section-header{text-align:center;margin-bottom:48px}
.section-eyebrow{
  display:inline-flex;align-items:center;gap:7px;
  padding:5px 15px;
  background:rgba(139,92,246,.09);
  border:1px solid rgba(139,92,246,.22);
  border-radius:100px;
  font-size:12px;font-weight:600;
  color:var(--purple-light);
  letter-spacing:.06em;text-transform:uppercase;
  margin-bottom:16px;
}
.section-title{font-size:clamp(26px,4.5vw,42px);margin-bottom:14px}
.section-desc{font-size:16px;color:var(--text2);max-width:580px;margin:0 auto;line-height:1.7}

/* ── Glass Card ─────────────────────────────────────────── */
.glass-card{
  background:rgba(22,22,37,.75);
  backdrop-filter:blur(18px);
  border:1px solid var(--border);
  border-radius:var(--radius-xl);
  padding:28px;
}

/* ── Reveal Animation ───────────────────────────────────── */
/* Hero content is NOT wrapped in .reveal — always visible */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .55s ease,transform .55s ease}
.reveal.revealed{opacity:1;transform:translateY(0)}

/* ── Announcement Banner ────────────────────────────────── */
.banner-strip{
  background:linear-gradient(90deg,#5b21b6,#4f46e5,#6d28d9,#4f46e5,#5b21b6);
  background-size:300% 100%;
  animation:bannerSlide 5s linear infinite;
  padding:9px 16px;
  text-align:center;
  font-family:var(--font-display);
  font-size:13px;font-weight:600;
  color:rgba(255,255,255,.92);
  letter-spacing:.02em;
  position:relative;z-index:101;
}
@keyframes bannerSlide{0%{background-position:0% 0%}100%{background-position:300% 0%}}

/* ── Navbar ─────────────────────────────────────────────── */
.nav{
  position:sticky;top:0;left:0;right:0;z-index:100;
  padding:14px 20px;
  background:rgba(10,10,18,.92);
  backdrop-filter:blur(22px);-webkit-backdrop-filter:blur(22px);
  border-bottom:1px solid rgba(255,255,255,.06);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
}
.nav-brand{
  font-family:var(--font-display);font-weight:800;font-size:20px;
  background:linear-gradient(135deg,#c084fc,#818cf8);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
  flex-shrink:0;
}
.nav-links{display:flex;align-items:center;gap:28px;list-style:none}
.nav-links a{font-size:14px;font-weight:500;color:var(--text2);transition:color .2s}
.nav-links a:hover{color:var(--text)}
.nav-cta{display:flex;gap:10px;flex-shrink:0}

/* ── Hero Section ───────────────────────────────────────── */
/* KEY FIX: removed min-height:100vh — was causing giant blank area */
.hero{
  position:relative;
  padding:70px 20px 60px;
  display:flex;align-items:center;justify-content:center;
  overflow:hidden;
  background:var(--bg);
}
#particles-canvas{position:absolute;inset:0;pointer-events:none;z-index:0}
.hero-bg{
  position:absolute;inset:0;z-index:0;
  background:
    radial-gradient(ellipse 70% 50% at 50% 0%,  rgba(99,102,241,.18) 0%,transparent 65%),
    radial-gradient(ellipse 50% 40% at 85% 85%, rgba(139,92,246,.12) 0%,transparent 55%),
    radial-gradient(ellipse 45% 45% at 15% 65%, rgba(16,185,129,.06) 0%,transparent 55%);
}
.hero-icons{position:absolute;inset:0;pointer-events:none;overflow:hidden;z-index:0}
.floating-icon{
  position:absolute;font-size:1.8rem;opacity:.1;
  animation:floatIcon 7s ease-in-out infinite;
}
.floating-icon:nth-child(1){top:12%;left:6%;   animation-delay:0s}
.floating-icon:nth-child(2){top:20%;right:8%;  animation-delay:1s}
.floating-icon:nth-child(3){top:55%;left:4%;   animation-delay:2s}
.floating-icon:nth-child(4){top:65%;right:6%;  animation-delay:3s}
.floating-icon:nth-child(5){top:38%;left:12%;  animation-delay:4s}
.floating-icon:nth-child(6){top:30%;right:16%; animation-delay:1.5s}
@keyframes floatIcon{
  0%,100%{transform:translateY(0) rotate(0deg)}
  50%{transform:translateY(-16px) rotate(4deg)}
}

.hero-content{
  position:relative;text-align:center;max-width:760px;z-index:2;
  /* No opacity:0 — always visible */
}
.hero-badge{
  display:inline-flex;align-items:center;gap:7px;
  padding:7px 18px;
  background:rgba(245,158,11,.09);border:1px solid rgba(245,158,11,.28);
  border-radius:100px;
  font-family:var(--font-display);font-size:13px;font-weight:600;color:#fbbf24;
  margin-bottom:24px;
  animation:pulseGlow 2.5s ease-in-out infinite alternate;
}
@keyframes pulseGlow{
  from{box-shadow:0 0 0 rgba(245,158,11,0)}
  to{box-shadow:0 0 22px rgba(245,158,11,.22)}
}
.hero-title{
  font-family:var(--font-display);
  font-size:clamp(32px,6.5vw,64px);
  font-weight:800;margin-bottom:20px;
  line-height:1.1;letter-spacing:-.02em;
}
.hero-subtitle{
  font-size:clamp(15px,2.2vw,18px);color:var(--text2);
  max-width:560px;margin:0 auto 36px;line-height:1.75;
}
.hero-buttons{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* Hero stats strip */
.hero-stats-strip{
  display:flex;gap:0;justify-content:center;flex-wrap:wrap;
  margin-top:48px;padding-top:28px;
  border-top:1px solid rgba(255,255,255,.06);
}
.hero-stat{text-align:center;padding:0 28px;border-right:1px solid rgba(255,255,255,.07)}
.hero-stat:last-child{border-right:none}
.hero-stat-value{font-family:var(--font-display);font-size:26px;font-weight:800;color:var(--amber);display:block;line-height:1}
.hero-stat-label{font-size:12px;color:var(--text3);margin-top:5px;font-weight:500}

/* Scroll hint */
.hero-scroll-hint{display:flex;flex-direction:column;align-items:center;gap:6px;margin-top:32px;color:var(--text3);font-size:12px}
.scroll-dot{width:5px;height:5px;border-radius:50%;background:var(--purple);animation:scrollBounce 1.4s ease-in-out infinite}
@keyframes scrollBounce{0%,100%{transform:translateY(0);opacity:1}50%{transform:translateY(7px);opacity:.35}}

/* ── Section Divider ────────────────────────────────────── */
.section-divider{
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(139,92,246,.25),transparent);
  margin:0 20px;
}

/* ── Stats Section ──────────────────────────────────────── */
.stats-section{padding:56px 20px}
.stats-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:16px;max-width:860px;margin:0 auto;
}
.stat-card{
  text-align:center;padding:28px 16px;
  background:rgba(22,22,37,.7);
  border:1px solid rgba(139,92,246,.12);
  border-radius:var(--radius-xl);
  position:relative;overflow:hidden;
  transition:var(--transition);
}
.stat-card::before{
  content:'';position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,transparent,var(--purple),transparent);opacity:.6;
}
.stat-card:hover{transform:translateY(-4px);border-color:rgba(139,92,246,.3);box-shadow:0 12px 36px rgba(0,0,0,.25)}
.stat-icon{font-size:2rem;margin-bottom:10px;display:block}
.counter-value{
  font-family:var(--font-display);font-size:40px;font-weight:800;
  color:var(--amber);display:block;line-height:1;
}
.stat-label{color:var(--text2);font-size:13px;margin-top:7px;font-weight:500}

/* ── Test Cards ─────────────────────────────────────────── */
.tests-section{padding:64px 20px}
#mock-tests-grid{max-width:820px;margin:0 auto}

.test-card{
  background:linear-gradient(145deg,rgba(22,22,37,.95),rgba(18,18,30,.98));
  border:1px solid rgba(139,92,246,.14);
  border-radius:var(--radius-xl);
  padding:32px;position:relative;overflow:hidden;
  transition:transform .28s ease,box-shadow .28s ease,border-color .28s ease;
}
.test-card::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(135deg,rgba(99,102,241,.04),transparent 60%);
  opacity:0;transition:opacity .28s;pointer-events:none;
}
.test-card:hover{transform:translateY(-5px);box-shadow:0 20px 50px rgba(0,0,0,.4),0 0 0 1px rgba(139,92,246,.25)}
.test-card:hover::after{opacity:1}

.card-badge{
  position:absolute;top:18px;right:18px;
  padding:4px 12px;border-radius:100px;
  font-family:var(--font-display);font-size:11px;font-weight:700;
  letter-spacing:.07em;text-transform:uppercase;color:#0a0a12;
}
.card-header{display:flex;align-items:center;gap:16px;margin-bottom:24px;padding-right:80px}
.card-icon{font-size:2.6rem;flex-shrink:0}
.card-title{font-size:21px;color:var(--text);font-family:var(--font-display)}
.card-subtitle{color:var(--text2);font-size:13px;margin-top:3px}

.card-meta{
  display:grid;grid-template-columns:repeat(3,1fr);
  gap:10px;margin-bottom:22px;
  padding:16px;
  background:rgba(0,0,0,.2);border-radius:var(--radius);border:1px solid var(--border2);
}
.meta-item{display:flex;align-items:center;gap:7px;font-size:13px;color:var(--text2);font-weight:500}
.meta-icon{font-size:15px;flex-shrink:0}

.card-features{display:flex;flex-wrap:wrap;gap:7px;margin-bottom:24px}
.feature-tag{
  padding:4px 11px;
  background:rgba(139,92,246,.07);border:1px solid rgba(139,92,246,.18);
  border-radius:100px;font-size:12px;color:var(--purple-light);font-weight:500;
}
.card-pricing{
  display:flex;align-items:center;justify-content:space-between;
  margin-bottom:22px;padding:14px 18px;
  background:rgba(245,158,11,.04);border:1px solid rgba(245,158,11,.14);border-radius:var(--radius);
}
.price-group{display:flex;align-items:center;gap:10px}
.price-current{font-family:var(--font-display);font-size:34px;font-weight:800;color:var(--amber)}
.price-original{font-size:16px;color:var(--text3);text-decoration:line-through}
.price-off{
  padding:3px 9px;
  background:rgba(16,185,129,.12);border:1px solid rgba(16,185,129,.25);
  border-radius:100px;font-size:12px;font-weight:700;color:var(--emerald);
}
.card-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px}

/* ── Coming Soon ────────────────────────────────────────── */
.coming-soon-section{padding:48px 20px 64px}
#coming-soon-grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));
  gap:12px;max-width:940px;margin:0 auto;
}
.coming-soon-card{
  position:relative;display:flex;flex-direction:column;align-items:center;
  justify-content:center;gap:8px;padding:24px 12px;
  background:rgba(22,22,37,.5);border:1px solid rgba(255,255,255,.05);
  border-radius:var(--radius);text-align:center;transition:var(--transition);cursor:default;
}
.coming-soon-card:hover{border-color:rgba(139,92,246,.18);transform:translateY(-3px);background:rgba(22,22,37,.8)}
.cs-lock{position:absolute;top:9px;right:9px;font-size:11px;opacity:.35}
.cs-icon{font-size:1.8rem}
.cs-title{font-size:13px;font-weight:600;color:var(--text2);font-family:var(--font-display)}
.cs-badge{
  font-size:9px;font-weight:700;letter-spacing:.07em;
  padding:2px 8px;
  background:rgba(139,92,246,.09);border:1px solid rgba(139,92,246,.18);
  border-radius:100px;color:var(--purple-light);text-transform:uppercase;
}

/* ── Fact Section ───────────────────────────────────────── */
.fact-section{padding:32px 20px}
.fact-card{
  max-width:680px;margin:0 auto;padding:22px 28px;
  background:rgba(16,185,129,.04);border:1px solid rgba(16,185,129,.18);
  border-radius:var(--radius);text-align:center;
}
.fact-label{
  font-family:var(--font-display);font-size:11px;font-weight:700;
  letter-spacing:.1em;text-transform:uppercase;color:var(--emerald);margin-bottom:10px;
}
#daily-fact{font-size:15px;color:var(--text2);line-height:1.7}

/* ── Motivation Section ─────────────────────────────────── */
.motivation-section{padding:64px 20px}
.motivation-wrapper{
  max-width:660px;margin:0 auto;text-align:center;
  padding:52px 36px;
  background:linear-gradient(145deg,rgba(99,102,241,.06),rgba(139,92,246,.04));
  border:1px solid rgba(139,92,246,.18);border-radius:26px;
  position:relative;overflow:hidden;
}
.motivation-wrapper::before{
  content:'"';position:absolute;top:-30px;left:16px;
  font-size:180px;color:rgba(139,92,246,.05);
  font-family:Georgia,serif;line-height:1;pointer-events:none;
}
#quote-text{
  font-family:var(--font-display);font-size:clamp(18px,2.8vw,24px);font-weight:600;
  color:var(--text);margin-bottom:18px;
  transition:opacity .3s ease;position:relative;line-height:1.45;
}
#quote-author{color:var(--purple-light);font-size:14px;font-weight:500;transition:opacity .3s ease;position:relative}
.quote-dots{display:flex;justify-content:center;gap:6px;margin-top:22px;flex-wrap:wrap}
.quote-dot{width:5px;height:5px;border-radius:100px;background:rgba(255,255,255,.12);transition:all .3s}
.quote-dot.active{width:18px;background:var(--purple)}

/* ── Testimonials ───────────────────────────────────────── */
.testimonials-section{padding:64px 20px}
.testimonials-container{
  position:relative;max-width:660px;margin:0 auto;
  height:250px;         /* fixed height — fixes blank space bug */
  overflow:hidden;border-radius:var(--radius-xl);
}
#testimonials-track{position:relative;height:100%}
.testimonial-card{
  position:absolute;inset:0;padding:32px;
  background:rgba(22,22,37,.9);border:1px solid var(--border);
  border-radius:var(--radius-xl);
  transition:transform .55s cubic-bezier(.4,0,.2,1),opacity .4s ease;
  opacity:0;pointer-events:none;
}
.testimonial-card.active{opacity:1;pointer-events:auto}
.testimonial-quote{font-size:15px;color:var(--text2);line-height:1.75;margin-bottom:20px;font-style:italic}
.testimonial-footer{display:flex;align-items:center;gap:14px}
.testimonial-avatar{
  width:42px;height:42px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-display);font-weight:700;font-size:14px;color:#fff;flex-shrink:0;
}
.testimonial-name{font-family:var(--font-display);font-weight:700;font-size:15px}
.testimonial-role{font-size:12px;color:var(--text3);margin-top:2px}
.testimonial-score{margin-left:auto;font-family:var(--font-display);font-size:20px;font-weight:800;color:var(--amber)}
.testimonial-nav{display:flex;justify-content:center;gap:10px;margin-top:20px}
.testimonial-nav button{
  width:38px;height:38px;border-radius:50%;
  background:rgba(139,92,246,.09);border:1px solid rgba(139,92,246,.22);
  color:var(--text);font-size:16px;display:flex;align-items:center;justify-content:center;
  transition:var(--transition);
}
.testimonial-nav button:hover{background:rgba(139,92,246,.18);border-color:var(--purple)}

/* ── FAQ ────────────────────────────────────────────────── */
.faq-item{border-bottom:1px solid var(--border2);padding:18px 0}
.faq-question{
  font-family:var(--font-display);font-weight:600;font-size:15px;
  cursor:pointer;display:flex;justify-content:space-between;align-items:center;
  color:var(--text);gap:16px;
}
.faq-answer{color:var(--text2);font-size:14px;margin-top:12px;line-height:1.75;display:none}
.faq-item.open .faq-answer{display:block}
.faq-chevron{transition:transform .3s;color:var(--purple-light);font-size:14px;flex-shrink:0}
.faq-item.open .faq-chevron{transform:rotate(180deg)}

/* ── Footer ─────────────────────────────────────────────── */
.footer{padding:44px 20px;border-top:1px solid rgba(255,255,255,.05);text-align:center;color:var(--text3);font-size:13px}
.footer-brand{font-family:var(--font-display);font-size:22px;font-weight:800;color:var(--text);margin-bottom:10px}
.footer-links{display:flex;justify-content:center;gap:20px;margin:16px 0;flex-wrap:wrap}
.footer-links a{color:var(--text2);transition:color .2s;font-size:13px;font-weight:500}
.footer-links a:hover{color:var(--purple-light)}

/* ── Quiz / Result / Detail Navbars ────────────────────── */
.quiz-nav,.result-nav,.detail-nav{
  position:sticky;top:0;z-index:100;
  padding:12px 20px;
  background:rgba(10,10,18,.95);
  backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  border-bottom:1px solid rgba(255,255,255,.06);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
}
.quiz-nav-brand,.result-nav-brand,.detail-nav-brand{
  font-family:var(--font-display);font-weight:800;font-size:17px;
  color:var(--purple-light);white-space:nowrap;flex-shrink:0;
}
.quiz-nav-info{display:flex;align-items:center;gap:14px;flex:1;justify-content:center;overflow:hidden}
.quiz-nav-title{font-size:13px;font-weight:600;color:var(--text2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:240px}

/* Timer */
.timer-box{
  display:flex;align-items:center;gap:7px;
  padding:9px 16px;
  background:rgba(99,102,241,.09);border:1px solid rgba(99,102,241,.22);
  border-radius:var(--radius-sm);
  font-family:var(--font-display);font-size:18px;font-weight:700;letter-spacing:.04em;flex-shrink:0;
}
#timer-display.warning{color:var(--amber)}
#timer-display.danger{color:var(--red);animation:timerPulse .9s infinite}
@keyframes timerPulse{0%,100%{opacity:1}50%{opacity:.45}}

/* ── Quiz Wrapper ───────────────────────────────────────── */
.quiz-wrapper{
  display:grid;grid-template-columns:1fr 288px;
  gap:18px;max-width:1060px;margin:0 auto;
  padding:20px 20px 60px;align-items:start;
}

/* Progress bar */
.progress-bar-track{height:5px;background:rgba(255,255,255,.07);border-radius:100px;overflow:hidden}
#progress-fill{height:100%;background:linear-gradient(90deg,var(--purple),var(--indigo));border-radius:100px;transition:width .4s ease}

/* Question card */
.question-card{
  background:rgba(22,22,37,.8);border:1px solid var(--border);
  border-radius:var(--radius-xl);padding:28px;
}
.question-card-header{
  display:flex;align-items:center;justify-content:space-between;
  margin-bottom:20px;padding-bottom:14px;border-bottom:1px solid var(--border2);
}
.question-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.question-number{font-size:13px;font-weight:600;color:var(--text3)}
.question-topic{
  padding:3px 11px;
  background:rgba(139,92,246,.09);border:1px solid rgba(139,92,246,.18);
  border-radius:100px;font-size:11px;color:var(--purple-light);
  font-weight:600;text-transform:uppercase;letter-spacing:.04em;
}
.question-text{
  font-size:16px;font-weight:600;line-height:1.65;margin-bottom:22px;
  padding:20px;background:rgba(0,0,0,.2);border:1px solid var(--border2);
  border-radius:var(--radius);color:var(--text);
}

/* Options */
.options-grid{display:flex;flex-direction:column;gap:10px}
.option{
  display:flex;align-items:center;gap:14px;padding:14px 18px;
  background:rgba(22,22,37,.6);border:1px solid rgba(255,255,255,.06);
  border-radius:var(--radius);cursor:pointer;transition:var(--transition);
}
.option:hover{border-color:rgba(139,92,246,.35);background:rgba(139,92,246,.05);transform:translateX(3px)}
.option.selected{border-color:var(--purple);background:rgba(139,92,246,.1)}
.option-letter{
  width:30px;height:30px;border-radius:7px;
  background:rgba(139,92,246,.09);border:1px solid rgba(139,92,246,.18);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-display);font-weight:700;font-size:12px;
  flex-shrink:0;color:var(--purple-light);
}
.option.selected .option-letter{background:var(--purple);border-color:var(--purple);color:#fff}
.option-text{flex:1;font-size:14px;font-weight:500}
.option-check{color:var(--emerald);font-weight:700;font-size:16px}

/* Controls bar */
.controls-bar{
  display:flex;align-items:center;gap:9px;
  margin-top:20px;padding-top:18px;border-top:1px solid var(--border2);flex-wrap:wrap;
}
.controls-bar .spacer{flex:1}
#review-btn{
  padding:10px 16px;
  background:rgba(245,158,11,.07);border:1px solid rgba(245,158,11,.18);
  border-radius:var(--radius-sm);color:#fbbf24;
  font-family:var(--font-display);font-size:13px;font-weight:600;
  transition:var(--transition);cursor:pointer;
}
#review-btn:hover,#review-btn.active{background:rgba(245,158,11,.14);border-color:rgba(245,158,11,.4)}

/* Sidebar */
.sidebar{position:sticky;top:68px;display:flex;flex-direction:column;gap:14px}
.sidebar-header,.palette-card,.stats-card{
  background:rgba(22,22,37,.8);border:1px solid var(--border);
  border-radius:var(--radius);padding:18px;
}
.sidebar-title,.palette-label{
  font-family:var(--font-display);font-size:11px;font-weight:700;
  text-transform:uppercase;letter-spacing:.08em;color:var(--text3);margin-bottom:13px;
}
.student-info{display:flex;align-items:center;gap:11px;margin-bottom:14px}
.student-avatar{
  width:40px;height:40px;border-radius:50%;
  background:linear-gradient(135deg,var(--purple),var(--indigo));
  display:flex;align-items:center;justify-content:center;font-size:18px;flex-shrink:0;
}
.student-name{font-family:var(--font-display);font-weight:700;font-size:14px}
.student-test{font-size:11px;color:var(--text3);margin-top:1px}

.legend{display:flex;flex-direction:column;gap:7px;font-size:12px}
.legend-item{display:flex;align-items:center;gap:9px;color:var(--text2)}
.legend-dot{width:18px;height:18px;border-radius:4px;flex-shrink:0}
.legend-dot.answered{background:rgba(16,185,129,.25);border:1px solid rgba(16,185,129,.45)}
.legend-dot.review{background:rgba(245,158,11,.18);border:1px solid rgba(245,158,11,.38)}
.legend-dot.current{background:rgba(139,92,246,.25);border:1px solid var(--purple)}
.legend-dot.not-visited{background:rgba(255,255,255,.04);border:1px solid var(--border2)}

#palette-stats{display:flex;flex-direction:column;gap:7px}
.stat-item{display:flex;align-items:center;gap:9px;font-size:13px;color:var(--text2)}
.stat-item span{
  width:28px;height:28px;border-radius:6px;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-display);font-weight:700;font-size:13px;flex-shrink:0;
}
.stat-item.answered  span{background:rgba(16,185,129,.14);color:var(--emerald)}
.stat-item.unanswered span{background:rgba(255,255,255,.04);color:var(--text3)}
.stat-item.review    span{background:rgba(245,158,11,.09);color:var(--amber)}

#question-palette{display:grid;grid-template-columns:repeat(5,1fr);gap:7px}
.palette-btn{
  width:100%;aspect-ratio:1;border-radius:7px;
  background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.07);
  color:var(--text2);font-family:var(--font-display);font-size:12px;font-weight:600;
  transition:var(--transition);cursor:pointer;
}
.palette-btn:hover{border-color:rgba(139,92,246,.35);color:var(--text)}
.palette-btn.current{border-color:var(--purple);background:rgba(139,92,246,.18);color:#fff}
.palette-btn.answered{background:rgba(16,185,129,.13);border-color:rgba(16,185,129,.38);color:var(--emerald)}
.palette-btn.review{background:rgba(245,158,11,.09);border-color:rgba(245,158,11,.28);color:var(--amber)}
.palette-btn.answered-review{background:rgba(139,92,246,.13);border-color:var(--purple);color:var(--purple-light)}
.palette-btn.visited{border-color:rgba(255,255,255,.09);color:var(--text3)}

/* ── Modal ──────────────────────────────────────────────── */
.modal-overlay{
  position:fixed;inset:0;background:rgba(0,0,0,.72);
  backdrop-filter:blur(10px);z-index:999;
  display:flex;align-items:center;justify-content:center;padding:20px;
  opacity:0;pointer-events:none;transition:opacity .28s;
}
.modal-overlay.open{opacity:1;pointer-events:all}
.modal{
  background:var(--surface2);border:1px solid var(--border);
  border-radius:var(--radius-xl);padding:36px;
  max-width:440px;width:100%;
  transform:scale(.92);transition:transform .32s cubic-bezier(.34,1.56,.64,1);
  text-align:center;
}
.modal-overlay.open .modal{transform:scale(1)}
.modal-icon{font-size:3rem;margin-bottom:14px}
.modal-title{font-family:var(--font-display);font-size:22px;margin-bottom:8px}
.modal-desc{color:var(--text2);margin-bottom:22px;font-size:14px;line-height:1.65}
.modal-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:24px}
.modal-stat{text-align:center;padding:12px 8px;background:rgba(255,255,255,.04);border-radius:10px}
.modal-stat-value{font-family:var(--font-display);font-size:22px;font-weight:800;color:var(--purple-light)}
.modal-stat-label{font-size:11px;color:var(--text3);margin-top:3px}
.modal-actions{display:flex;gap:10px}

/* ── Top Buy Banner ─────────────────────────────────────── */
.top-buy-banner{
  background:linear-gradient(135deg,rgba(245,158,11,.07),rgba(239,68,68,.04));
  border-bottom:1px solid rgba(245,158,11,.18);
  padding:12px 20px;text-align:center;font-size:14px;color:var(--text2);
  position:relative;z-index:99;
}
.top-buy-banner strong{color:#fbbf24}
.top-buy-banner a{color:#fbbf24;font-weight:700;text-decoration:underline;margin-left:7px}

/* ── Result Page ─────────────────────────────────────────── */
.result-wrapper{max-width:820px;margin:0 auto;padding:28px 20px 72px}
.result-hero{
  text-align:center;padding:44px 28px;
  background:linear-gradient(145deg,rgba(22,22,37,.95),rgba(18,18,30,.98));
  border:1px solid var(--border);border-radius:24px;margin-bottom:24px;
  position:relative;overflow:hidden;
}
.result-rank-icon{font-size:3.5rem;margin-bottom:14px;animation:bounceIn .7s cubic-bezier(.36,.07,.19,.97) both}
@keyframes bounceIn{0%{transform:scale(0);opacity:0}60%{transform:scale(1.18)}100%{transform:scale(1);opacity:1}}
.result-rank{font-family:var(--font-display);font-size:28px;font-weight:800;margin-bottom:7px}
.result-message{color:var(--text2);font-size:15px;max-width:460px;margin:0 auto}

.result-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:14px;margin-bottom:24px}
.result-stat{text-align:center;padding:20px 12px;background:rgba(22,22,37,.7);border:1px solid var(--border);border-radius:var(--radius)}
.result-stat-value{font-family:var(--font-display);font-size:30px;font-weight:800;margin-bottom:5px}
.result-stat-label{color:var(--text3);font-size:12px}

/* Tabs */
.result-tabs{
  display:flex;gap:3px;
  background:rgba(22,22,37,.6);border:1px solid var(--border);
  border-radius:var(--radius);padding:4px;margin-bottom:22px;
}
.result-tab{
  flex:1;padding:9px;border-radius:calc(var(--radius) - 3px);
  font-family:var(--font-display);font-weight:600;font-size:13px;
  color:var(--text2);text-align:center;cursor:pointer;
  transition:var(--transition);background:transparent;border:none;
}
.result-tab.active{background:rgba(139,92,246,.14);color:var(--purple-light);border:1px solid rgba(139,92,246,.28)}
.tab-panel{display:none}
.tab-panel.active{display:block}

/* Review */
.review-item{
  padding:18px 20px;background:rgba(22,22,37,.6);border:1px solid var(--border2);
  border-radius:var(--radius);margin-bottom:10px;
}
.review-item.correct{border-color:rgba(16,185,129,.28)}
.review-item.wrong{border-color:rgba(239,68,68,.25)}
.review-q{font-size:14px;font-weight:600;margin-bottom:11px}
.review-options{display:flex;flex-direction:column;gap:5px}
.review-option{padding:7px 13px;border-radius:7px;font-size:13px;background:rgba(255,255,255,.03)}
.review-option.correct-opt{background:rgba(16,185,129,.09);border:1px solid rgba(16,185,129,.25);color:var(--emerald)}
.review-option.wrong-opt{background:rgba(239,68,68,.07);border:1px solid rgba(239,68,68,.18);color:var(--red)}
.review-explanation{
  margin-top:10px;padding:10px 14px;
  background:rgba(139,92,246,.05);border:1px solid rgba(139,92,246,.13);
  border-radius:8px;font-size:13px;color:var(--text2);line-height:1.65;
}

/* Topic bars */
.topic-row{margin-bottom:14px}
.topic-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:7px;font-size:14px}
.topic-bar-track{height:7px;background:rgba(255,255,255,.06);border-radius:100px;overflow:hidden}
.topic-bar-fill{height:100%;border-radius:100px;transition:width 1s ease}

/* Accuracy meter */
.meter-track{height:10px;background:rgba(255,255,255,.06);border-radius:100px;overflow:hidden}
.meter-fill{height:100%;border-radius:100px;transition:width 1.4s cubic-bezier(.4,0,.2,1)}

/* Badges */
.badges-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:14px;margin-top:20px}
.badge-card{
  text-align:center;padding:20px 14px;
  background:rgba(22,22,37,.5);border:1px solid rgba(255,255,255,.05);
  border-radius:var(--radius);transition:var(--transition);
}
.badge-card.earned{background:rgba(139,92,246,.06);border-color:rgba(139,92,246,.22)}
.badge-card.earned:hover{transform:translateY(-3px);border-color:var(--purple)}
.badge-icon{font-size:1.8rem;margin-bottom:7px}
.badge-name{font-family:var(--font-display);font-weight:700;font-size:13px;margin-bottom:4px}
.badge-desc{font-size:11px;color:var(--text3);line-height:1.45}
.badge-xp{font-size:11px;color:var(--emerald);font-weight:600;margin-top:5px}
.badge-locked{opacity:.3;filter:grayscale(1)}

/* Unlock section */
.unlock-section{
  padding:48px 28px;
  background:linear-gradient(145deg,rgba(139,92,246,.07),rgba(99,102,241,.04));
  border:1px solid rgba(139,92,246,.22);border-radius:26px;
  text-align:center;margin-bottom:28px;position:relative;overflow:hidden;
}
.unlock-title{font-size:clamp(22px,3.5vw,32px);margin-bottom:11px;position:relative}
.unlock-desc{color:var(--text2);font-size:15px;max-width:520px;margin:0 auto 28px;position:relative;line-height:1.7}

.blurred-preview{
  background:rgba(0,0,0,.28);border:1px solid var(--border);border-radius:var(--radius);
  padding:18px;margin-bottom:28px;position:relative;overflow:hidden;
  filter:blur(3px);pointer-events:none;user-select:none;min-height:80px;
}
.blurred-preview::after{
  content:'🔒 PREMIUM CONTENT';position:absolute;inset:0;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-display);font-size:20px;font-weight:800;
  background:rgba(10,10,18,.72);filter:none;color:var(--amber);letter-spacing:.1em;
}

.premium-benefits{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));
  gap:10px;margin-bottom:28px;text-align:left;position:relative;
}
.benefit-item{
  display:flex;align-items:center;gap:10px;padding:10px 14px;
  background:rgba(16,185,129,.05);border:1px solid rgba(16,185,129,.13);
  border-radius:var(--radius-sm);font-size:14px;font-weight:500;
}
.benefit-check{color:var(--emerald);font-size:16px;flex-shrink:0}

.price-display{margin-bottom:28px;position:relative}
.price-tag{font-family:var(--font-display);font-size:52px;font-weight:800;color:var(--amber)}
.price-original2{font-size:22px;color:var(--text3);text-decoration:line-through;margin-left:10px}
.price-note{color:var(--text2);font-size:14px;margin-top:7px}

.buy-buttons{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;position:relative}

/* Share */
.share-btn{
  display:inline-flex;align-items:center;gap:7px;padding:9px 18px;
  border-radius:var(--radius-sm);font-size:13px;font-weight:600;
  border:1px solid var(--border);color:var(--text2);background:rgba(255,255,255,.04);
  cursor:pointer;transition:var(--transition);text-decoration:none;
}
.share-btn:hover{border-color:var(--purple);color:var(--purple-light);background:rgba(139,92,246,.07)}

/* Achievement popup */
.achievement-popup{
  position:fixed;bottom:20px;right:20px;
  background:rgba(22,22,37,.97);border:1px solid rgba(245,158,11,.35);
  border-radius:var(--radius);padding:14px 18px;
  display:flex;align-items:center;gap:12px;
  box-shadow:0 8px 28px rgba(0,0,0,.4),0 0 20px rgba(245,158,11,.15);
  transform:translateX(130%);transition:transform .48s cubic-bezier(.34,1.56,.64,1);
  z-index:9999;max-width:280px;
}
.achievement-popup.show{transform:translateX(0)}
.achievement-popup-icon{font-size:1.8rem;flex-shrink:0}
.achievement-popup-title{font-family:var(--font-display);font-size:10px;text-transform:uppercase;letter-spacing:.1em;color:var(--amber);font-weight:700;margin-bottom:3px}
.achievement-popup-name{font-family:var(--font-display);font-weight:700;font-size:14px}
.achievement-popup-xp{font-size:12px;color:var(--emerald);margin-top:2px}

/* Confetti */
.confetti-piece{position:fixed;animation:confettiFall linear forwards;z-index:9998;pointer-events:none}
@keyframes confettiFall{0%{transform:translateY(-20px) rotate(0deg);opacity:1}100%{transform:translateY(100vh) rotate(720deg);opacity:0}}

/* Direct buy banner */
.direct-buy-banner{
  background:linear-gradient(135deg,rgba(245,158,11,.08),rgba(239,68,68,.04));
  border:1px solid rgba(245,158,11,.25);border-radius:var(--radius);
  padding:18px 24px;display:flex;align-items:center;justify-content:space-between;
  gap:16px;flex-wrap:wrap;margin-bottom:28px;
}
.direct-buy-text{font-size:15px;color:var(--text2)}
.direct-buy-text strong{color:var(--text)}

/* ── Detail Page ─────────────────────────────────────────── */
.detail-wrapper{
  display:grid;grid-template-columns:1fr 320px;
  gap:24px;max-width:1060px;margin:0 auto;padding:24px 20px 60px;align-items:start;
}
.detail-sidebar{position:sticky;top:68px}
.detail-hero{
  background:linear-gradient(145deg,rgba(22,22,37,.9),rgba(18,18,30,.95));
  border:1px solid var(--border);border-radius:var(--radius-xl);padding:36px;margin-bottom:22px;
}
.detail-eyebrow{display:flex;align-items:center;gap:10px;margin-bottom:18px}
.detail-title{font-size:clamp(22px,3.5vw,34px);margin-bottom:12px}
.detail-desc{color:var(--text2);font-size:15px;line-height:1.75;margin-bottom:24px}
.detail-tags{display:flex;flex-wrap:wrap;gap:7px;margin-bottom:24px}
.detail-tag{padding:4px 13px;background:rgba(139,92,246,.07);border:1px solid rgba(139,92,246,.18);border-radius:100px;font-size:12px;color:var(--purple-light)}
.detail-info-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-bottom:24px}
.detail-info-item{text-align:center;padding:18px 10px;background:rgba(0,0,0,.2);border:1px solid var(--border2);border-radius:var(--radius)}
.detail-info-icon{font-size:1.6rem;margin-bottom:7px}
.detail-info-value{font-family:var(--font-display);font-size:20px;font-weight:800;color:var(--text);margin-bottom:3px}
.detail-info-label{font-size:12px;color:var(--text3)}

.buy-card{background:rgba(22,22,37,.95);border:1px solid var(--border);border-radius:var(--radius-xl);padding:24px;margin-bottom:14px}
.buy-price-row{display:flex;align-items:center;gap:10px;margin-bottom:7px}
.buy-price{font-family:var(--font-display);font-size:40px;font-weight:800;color:var(--amber)}
.buy-price-old{font-size:18px;color:var(--text3);text-decoration:line-through}
.buy-discount{padding:3px 9px;background:rgba(16,185,129,.1);border:1px solid rgba(16,185,129,.25);border-radius:100px;font-size:12px;font-weight:700;color:var(--emerald)}
.buy-note{font-size:12px;color:var(--text3);margin-bottom:20px}
.buy-features{display:flex;flex-direction:column;gap:9px;margin-bottom:20px}
.buy-feature{display:flex;align-items:center;gap:9px;font-size:13px;color:var(--text2);font-weight:500}
.buy-feature-icon{color:var(--emerald);font-size:15px;flex-shrink:0}
.buy-divider{height:1px;background:var(--border2);margin:16px 0}

.free-card{background:rgba(139,92,246,.04);border:1px solid rgba(139,92,246,.18);border-radius:var(--radius-xl);padding:20px;text-align:center}
.free-card-title{font-family:var(--font-display);font-size:15px;font-weight:700;margin-bottom:7px}
.free-card-desc{font-size:13px;color:var(--text2);margin-bottom:14px}

/* Syllabus */
.syllabus-card{background:rgba(22,22,37,.7);border:1px solid var(--border);border-radius:var(--radius-xl);padding:28px;margin-bottom:22px}
.syllabus-unit{margin-bottom:18px}
.syllabus-unit-title{font-family:var(--font-display);font-weight:700;font-size:14px;color:var(--purple-light);margin-bottom:9px;display:flex;align-items:center;gap:7px}
.syllabus-topics{display:flex;flex-wrap:wrap;gap:6px}
.syllabus-topic{padding:3px 9px;background:rgba(255,255,255,.04);border:1px solid var(--border2);border-radius:6px;font-size:12px;color:var(--text2)}

/* Rating bars */
.rating-bar-row{display:flex;align-items:center;gap:10px;margin-bottom:9px;font-size:13px}
.rating-bar-label{width:55px;text-align:right;color:var(--text2);flex-shrink:0}
.rating-bar-track{flex:1;height:5px;background:rgba(255,255,255,.06);border-radius:100px;overflow:hidden}
.rating-bar-fill{height:100%;background:linear-gradient(90deg,var(--amber),#fcd34d);border-radius:100px}
.rating-bar-count{width:28px;color:var(--text3);font-size:12px;flex-shrink:0}

/* ── Responsive ─────────────────────────────────────────── */
@media(max-width:900px){
  .detail-wrapper{grid-template-columns:1fr}
  .detail-sidebar{position:static}
  .detail-info-grid{grid-template-columns:repeat(2,1fr)}
}

@media(max-width:768px){
  .nav-links{display:none}
  .hero{padding:52px 16px 44px}
  .hero-stats-strip{gap:0}
  .hero-stat{padding:0 16px}
  .hero-stat-value{font-size:20px}
  .stats-section{padding:40px 16px}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:12px}
  .counter-value{font-size:32px}
  .tests-section{padding:48px 16px}
  .card-meta{grid-template-columns:repeat(2,1fr)}
  .card-actions{grid-template-columns:1fr}
  .card-header{padding-right:60px}
  .coming-soon-section{padding:40px 16px 48px}
  .motivation-section{padding:48px 16px}
  .motivation-wrapper{padding:36px 20px}
  .testimonials-section{padding:48px 16px}
  .testimonials-container{height:300px}
  .testimonial-card{padding:22px}
  .quiz-wrapper{grid-template-columns:1fr;padding:16px 14px 80px}
  .sidebar{position:static;flex-direction:row;flex-wrap:wrap}
  .sidebar>*{flex:1;min-width:200px}
  .question-card{padding:18px 14px}
  .question-text{font-size:15px;padding:16px}
  .result-wrapper{padding:20px 14px 60px}
  .result-hero{padding:32px 18px}
  .unlock-section{padding:32px 16px}
  .buy-buttons{flex-direction:column;align-items:center}
  .premium-benefits{grid-template-columns:1fr}
  .direct-buy-banner{flex-direction:column;text-align:center}
  .modal{padding:24px 18px}
}

@media(max-width:480px){
  .hero-buttons{flex-direction:column;align-items:center}
  .hero-buttons .btn{width:100%;max-width:300px}
  .hero-stats-strip{gap:12px;flex-direction:column;border-top:none;padding-top:20px}
  .hero-stat{border-right:none;padding:0}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .result-stats{grid-template-columns:repeat(2,1fr)}
  .result-tabs{gap:2px}
  .result-tab{font-size:12px;padding:8px 4px}
  #coming-soon-grid{grid-template-columns:repeat(auto-fill,minmax(100px,1fr))}
  .card-meta{grid-template-columns:1fr 1fr}
  .modal-stats{grid-template-columns:repeat(3,1fr)}
  .detail-info-grid{grid-template-columns:repeat(2,1fr)}
}